rob84

iTrader: (5)

Standard gasket thickness is 0.7mm
Right if the standard compression ratio on my ej257 is
Compression 8.2 ± 0.2

and I fit Mahle Forged Pistons with a COMPRESSION HEIGHT of 1.209" AND 22cc BOWL VOLUME.

what thickness cometic steel headgaskets do I fit to keep within the standard Ratio Range ??

merlin24

iTrader: (1)

Assuming your heads and block deck faces have not been skimmed, then your measured standard head gasket thickness of 0.7mm would give you a static CR of 8.33:1.
Always best to do a dry build of the block to measure the deck height clearance of the pistons and then volume the combustion chambers to confirm and determine your final gasket thickness.
I think the EJ257 heads come out at approx. 54cc ( but thats on a sunday afternoon after a few beers lol ).


Mick